Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da65b4ec2bdc65b…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 19:21:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f766b3f4e566da287ca3accbf60fc55c SHA-1: fb3b34b9b2f25dabb36205de1570db9fd1e850f0 SHA-256: 1da65b4ec2bdc65bb1bebd6c69c8decc930d6877753bb973d2ce6a0dc0432bc9
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and free currency, with a primary link identified as a malicious redirector. The document body and heuristics indicate a lure for free game items, likely leading to a phishing or malware download site. No scripts were extracted, but the embedded URLs and the nature of the lures strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/406889139/20-free-spins-coin-master-game-hack In PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/guess-the-song-cheat-sheet-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/pokemon-go-free-coins-hack-2021_GM1094591345.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/ninja-legends-roblox-hacked-pet_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/descargar-hacks-en-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/moana-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-bc-claims_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hack-cheats-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-wings-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/toolbox-apk_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/cch-ly-robux-free-minhmama_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000300e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300E 22052 bytes
SHA-256: eb90e3a5232730552540738e58554bec0f161c289ddedc6ac767a512d6ec1a12
font_01_sfnt_off000060e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E3 18472 bytes
SHA-256: 9bbada0425f487f3c4a68143d9c445a4c5f68259678acbb3e596bfcd884a6068

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